JP2002186536A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which is simple-structured but can be adjusted for depth and angle of backrest at the same time. SOLUTION: The chair 1 comprises a seat section 3, a pair of armrest members 10 which are installed on the seat section 3 via columns 8 and 9 and are extended in the back and forth direction, a backrest 4 supported between the armrest members 10, installation holes formed in the armrest members and the backrest 4, and installation screws to be inserted and screwed into the installation holes to fix the backrest 4 to the armrest members 10. The backrest 4 is provided with one first installation hole and a group of second installation holes 34 formed in a circular arc around the first installation hole, and the armrest members 10 are provided with a plurality of third installation holes 13 which are formed in series in the back and forth direction and can be aligned with the first installation holes, and a plurality of fourth installation holes 14 which are formed in series in the back and forth direction and can be aligned with the group of second installation holes 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair, and more particularly, to a chair that can be adjusted according to a user's body shape and the like.

[0002]

2. Description of the Related Art A chair used for office work or learning is mainly composed of a seat having a seat surface, legs for supporting the seat, and a backrest standing upright from the rear end of the seat. And armrest members located on both left and right sides of the seat and extending in the front-rear direction. In some cases, casters are provided on the legs so that the chair can be easily moved.

[0003] There is also known a chair provided with a height adjustment mechanism so that the height of the seat surface can be adjusted. This allows the height of the seat relative to the legs to be adjusted according to changes in the body shape of the user, that is, changes in the body shape due to the growth of the child and changes in the body shape due to the change in the user. .
According to this, even if the body shape changes due to growth, it can be used for many years, and even if the user changes, it can be used at a height that matches its own body.

However, in order to make the chair comfortable to use,
Adjusting the height of the seat surface alone is not sufficient, and it is necessary to adjust the position of the backrest relative to the seat, that is, the depth, the angle of the backrest, or the angle of the seating surface. And these adjustments, of course, the physical condition of the user, how to use,
It may be requested depending on the work content, the usage time, and the like. In addition, when a person who has difficulty walking can be moved using the chair, the user's body must be supported by the backrest. Therefore, it is particularly desired to adjust the depth and the angle of the backrest. .

[0005] In response to such demands, those capable of adjusting the depth or the angle of the backrest have been proposed.

[0006]

However, the proposed conventional chairs cannot be manufactured at low cost due to their complicated structure. Further, since the depth adjustment and the angle adjustment of the backrest are configured by different mechanisms, they cannot be adjusted at the same time, and it takes time for the adjustment work.

[0007] In view of the above circumstances, an object of the present invention is to provide a chair that can simultaneously adjust the depth and the angle of the backrest with a simple configuration.

[0008]

According to a first aspect of the present invention, there is provided a chair, comprising: a seat; a pair of armrest members attached to the seat via a support post and extending in a front-rear direction; A backrest supported on the armrest member, a mounting hole formed in each of the opposing surfaces of the armrest member and the backrest, and an attachment inserted into the mounting hole and screwing the backrest to the armrest member. A chair having a screw, wherein the backrest includes, as the mounting hole, one first mounting hole, and a plurality of second mounting holes drilled on an arc centered on the first mounting hole. The armrest member has a plurality of third mounting holes that are continuously drilled in the front-rear direction as the mounting holes and can match the first mounting hole, and are drilled continuously in the front-rear direction, and And a plurality of fourth mounting holes that can match the second mounting holes. The depth of the backrest with respect to the seat is set by selecting the third mounting hole that matches the first mounting hole from a plurality of the third mounting holes, and setting the fourth mounting hole. The second mounting hole to match
The angle of the backrest with respect to the seat is set by selecting from among the plurality of second mounting holes.

Therefore, according to the chair of the first aspect of the present invention, the backrest is disposed between the pair of armrest members, and the first mounting hole of the backrest and the third mounting hole of the armrest member corresponding thereto. Are fixedly supported by the mounting screw inserted into the backrest, the second mounting hole of the backrest, and the mounting screw inserted into the fourth mounting hole of the armrest member corresponding to the second mounting hole.

Since the armrest member has a plurality of third and fourth mounting holes, each of which is formed in a state of being connected in the front-rear direction, the third and fourth mounting holes are aligned with the first and second mounting holes of the backrest. The position of the backrest in the front-rear direction, that is, the depth, is set by selecting the fourth and fourth mounting holes from the plurality of third and fourth mounting holes.

[0011] Further, since a plurality of the second mounting holes of the backrest are formed on an arc centered on the first mounting hole, the second mounting holes matching the fourth mounting hole are formed by a plurality of second mounting holes. By selecting from the mounting holes, the angle of the backrest is set.

That is, the two mounting screws are removed, and the backrest is moved in the front-rear direction so that the depth becomes a desired length.
Further, with the backrest rotated so that the angle of the backrest becomes a desired angle, insert the two mounting screws again into the first and third mounting holes and the second and fourth mounting holes. By screwing together, both the depth and the angle of the backrest are adjusted.

The chair according to the second aspect of the present invention is the first aspect.
The chair according to claim 1, wherein the backrest has a backrest body having a backrest portion, and protrudes rearward from both left and right ends of the backrest body, and the first mounting hole and the second mounting hole are perforated. A mounting plate, wherein the first mounting hole and the fourth mounting hole are formed by screw holes into which the mounting screw can be screwed, and the mounting screw is inserted through the second mounting hole and the third mounting hole. It is composed of a through hole of a possible size.

Therefore, according to the chair of the second aspect of the present invention, in addition to the function of the first aspect of the present invention, the mounting screw for mounting the backrest is provided with respect to the first mounting hole and the third mounting hole corresponding thereto. Then, it is inserted from the outside, that is, from the armrest member side, and screwed into the first mounting hole. On the other hand, the second mounting hole and the fourth mounting hole corresponding to the second mounting hole are inserted from the inside, that is, from the mounting plate of the backrest, and screwed into the fourth mounting hole.

The chair according to the invention of claim 3 is the chair of claim 2.
In the chair described in the above, the mounting screw inserted into the second mounting hole, a male screw portion, a neck portion having a diameter larger than the male screw portion, and a head for rotating the male screw portion,
The second mounting hole has a counterbore for accommodating the neck of the mounting screw. Further, the adjacent counterbore portions communicate with each other within a range where the neck portion does not pass,
Adjacent through-holes are communicated with each other within a range in which the male screw portion can pass.

Therefore, according to the chair of the invention of claim 3, in addition to the effect of the invention of claim 2, it is possible to further improve the workability when only the angle of the backrest is adjusted. Specifically, when only the angle of the backrest is changed, since the rotation is performed around the first mounting hole, the work of changing the second mounting hole that matches the fourth mounting hole is performed. According to the invention, since the plurality of second mounting holes are communicated with each other, it is possible to make a change by loosening the fastening state to some extent without removing the mounting screw screwed into the fourth mounting hole. Becomes That is, the backrest can be rotated while the mounting screw is screwed into the fourth mounting hole. The counterbore of the second mounting hole is
Because the neck of the mounting screw communicates within the range that does not pass,
When the mounting screw is tightened and the neck is stored in one of the counterbore portions, it cannot be moved to another counterbore portion. That is, the rotation of the backrest is prevented by tightening the mounting screw to a certain degree or more.

A chair according to a fourth aspect of the present invention is the chair according to the first aspect.
The chair according to any one of claims 3 to 3, wherein the support comprises a leg / post that extends to below the seat, and a screw hole provided on a side surface of the seat, A side surface of the leg / post also has a plurality of fifth mounting holes drilled continuously in a vertical direction, and a seat mounting screw inserted through the fifth mounting hole and screwed into the screw hole. Things. Then, the height of the seat portion is set by selecting the fifth mounting hole that matches the screw hole from a plurality of the fifth mounting holes.

Therefore, according to the chair of the fourth aspect of the present invention, in addition to the function of any one of the first to third aspects of the present invention, the seat is disposed between the pair of legs and the column. ,
It is supported in a fixed state by a mounting screw that is inserted through the fifth mounting hole of the leg / post and is screwed into the screw hole of the seat.

Further, since there are a plurality of fifth mounting holes of the leg / post, which are drilled in a state of being connected in the vertical direction, the fifth mounting holes matching the screw holes are formed. By selecting from among them, the position of the seat is set.

The chair according to the fifth aspect of the present invention is the chair according to the first aspect.
5. The chair according to claim 4, wherein the seat is a seat body having a seating surface, a support provided below the seat body, and A pivot member for rotatably supporting either the front side or the rear side of the seat body, and a plurality of sixth mounting holes drilled in a vertical direction, the front side of the seat body or It further has a bracket for attaching one of the other rear side to the support base, and a screw hole provided on a side surface of the support base facing the bracket. Then, the angle of the seat surface is set by selecting the sixth mounting hole that matches the screw hole from among the plurality of sixth mounting holes.

Therefore, according to the chair of the fifth aspect of the present invention, in addition to the function of any one of the first to fourth aspects of the present invention, the seat body is disposed on the support base, It is fixed to the support via the material and the bracket. That is,
One of the front side and the rear side of the seat body is pivotally supported by the pivot member, and the other is fixed by the bracket. In particular, the bracket is provided with a sixth mounting hole in the mounting surface to the support base, and the bracket is mounted by a mounting screw inserted through the sixth mounting hole and screwed into a screw hole of the support base.

Since there are a plurality of sixth mounting holes, which are drilled in a state of being connected in the vertical direction, the sixth mounting hole to be matched with the screw hole is selected from the plurality of sixth mounting holes. Thus, the angle of the seat is set.

The chair according to the invention of claim 6 is the chair of claim 1.
The chair according to any one of claims 1 to 5, wherein the armrest member has an extended portion extending rearward, and a grip for pushing the chair between a pair of the extended portions. Is installed.

Therefore, according to the chair of the invention of claim 6, in addition to the function of any one of the inventions of claims 1 to 5, the grip is erected on the rear portion, so that the grip can be gripped. The chair can be boosted. The position of the grip does not change even if the position of the backrest or the angle of the backrest is changed.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A chair 1 according to an embodiment of the present invention will be described below with reference to FIGS. FIG.
4 to 4 are a side view, a front view, a plan view, and an exploded perspective view showing the configuration of the chair 1, FIG. 5 is a perspective view showing the configuration of a seat in the chair 1, and FIGS. 3 is an AA sectional view and a BB sectional view in FIG.
FIG. 3 is an explanatory diagram showing a configuration of a main part of FIG.

The chair 1 of the present embodiment is suitable as a chair for office work or learning, and can be used by a user who has difficulty walking for mobility. As shown in FIGS. 1 to 4, the chair 1 is mainly provided with support frames 2 provided on both left and right sides, a seat 3 for sitting down, and a rear upper portion of the seat 3. A backrest 4 and a grip 5 provided behind the backrest 4 are provided.

Each support frame 2 has a relatively large caster 6.
Are mounted on the front and rear of the footrest 7, a front post 8 is erected from the front of the upper surface of the footrest 7 and is inclined rearward, and a rear support is erected from the rear of the upper surface of the footrest 7 and is slightly inclined forward. 9 and an armrest member 10 extending further rearward from the upper end of the front support 8 through the upper end of the rear support 9, and has a generally trapezoidal annular side surface shape. A plurality of (for example, five) fifth mounting holes 12 are bored in the front column 8 and the rear column 9 in a row in the vertical direction. In addition, a plurality of (for example, four) third mounting holes 13 are formed in the armrest member 10 in a row in the front-rear direction. The fifth mounting hole 12 and the third mounting hole 13 are formed of through holes penetrating in the left-right direction, and have a diameter through which a mounting screw described later can be inserted. Further, a plurality of (for example, four) fourth mounting holes 14 are formed in the inner surface of the armrest member 10 in a row in the front-rear direction. The fourth mounting hole 14 is formed of a screw hole that is opened inward, and a female screw for screwing a screw with a knob described later is embedded therein. Here, the front support 8 and the rear support 9 correspond to the leg-supporting support of the present invention.

A circular depression (not shown) is formed on the inner surface of the extension portion 15 of the armrest member 10 extending rearward, and the end of the cylindrical grip 5 is inserted into the depression. Have been. That is, the grip 5 is rotatably supported by being sandwiched between the pair of left and right extending portions 15.

The seat 3 is composed of a seat main body 18 having a substantially square seat surface 17 and a support base 19 provided below the seat main body 18. The seat body 18 is the tip 2
0 has a hanging shape, and a leather seat is stretched over the entire seating surface 17 including the distal end portion 20. Also,
The support 19 is shown in FIG. 5 (the seat 3 is turned upside down).
As shown in FIG. 2, the vehicle is composed of two erection portions 21 erected between a pair of left and right support frames 2 and two reinforcing portions 22 disposed between the erection portions 21. In addition, the erection part 2
Two screw holes 23 are formed on both end surfaces of the device 1 in the vertical direction. That is, the mounting screw 28 is connected to the fifth mounting hole 1.
2 is screwed into the screw hole 23 so that the support base 19 is attached to the support frame 2.

As shown in FIGS. 5 and 6, the support base 19 is attached to the bottom surface of the seat body 18 via a butterfly plate 24 and a bracket 25. Specifically, the butterfly board 24
Has one part fixed to the bottom surface of the seat body 18 and the other part fixed to the inner surface of the rear erection part 21.
The seat body 18 is rotatably supported with respect to the seat 9. The bracket 25 is an L-shaped metal fitting having one piece fixed to the bottom surface of the seat body 18 and the other piece fixed to the inner surface of the front erection portion 21. The main body 18 is fixedly supported. This bracket 2
A plurality (for example, three) of sixth attachment holes 26 are formed in the other piece of the fifth member 5 in a row in the vertical direction. That is, the screw 27 with the knob is inserted into the sixth mounting hole 26 and screwed into a screw hole (not shown) formed in the erection portion 21.
The bracket 25 is fixed to the support 19. Here, the butterfly plate 24 corresponds to the pivot support member of the present invention.

The backrest 4, as shown in FIGS. 4, 6, and 7, has a backrest body 31 having a backrest portion 30 whose central portion is curved rearward, and is fixed to the left and right sides of the backrest body 31. And the mounting plate 32 formed. Mounting plate 32
Is a semi-disc-shaped member provided so as to protrude rearward from the end of the backrest main body 31, and is a first mounting hole 33 that can match the third mounting hole 13 formed in the armrest member 10. And a second group of mounting holes 34 that can match the fourth mounting hole 14 formed in the armrest member 10. More specifically, the first mounting hole 33 is formed of a screw hole formed so as to correspond to the end of the backrest main body 31. As shown in FIG. 8, the second mounting hole group 34 is formed as a single hole by connecting a plurality of second mounting holes 34 a formed on an arc centered on the first mounting hole 33. It is composed. The second mounting hole 34a has a counterbore 35 in which the neck 39 of the screw 37 with a knob is housed, and the screw 3 with a knob.
7 is provided with a through-hole portion 36 through which the male screw portion 38 can be inserted.
7 and the adjacent through-holes 36 are connected to each other in a range where the neck 39 of the screw 7 does not pass, and the male screw 3 of the screw 37 with the knob is connected.
8 has a shape that communicates within a passable range. That is, the counterbore portion 35 of the second mounting hole group 34 has a dumpling shape as a whole, and the through hole portion 36 has a long hole shape as a whole.

The screw 37 with the knob is provided with a male screw 38
, A neck portion 39 having a diameter larger than that of the male screw portion 38, and a knob-shaped head portion 40.
Then, the backrest 4 is prevented from rotating by being screwed into the fourth mounting hole 14 of the armrest member 10 after passing through the through-hole portion 36.

Next, a method of using the chair 1 of this embodiment, in particular, a method of adjusting each part will be described. When adjusting both the depth and the angle of the backrest 4, first, the armrest member 1
Screw 37 with a knob screwed into the fourth mounting hole 14
And the mounting screw 41 screwed into the first mounting hole 33 of the mounting plate 32 is rotated in a loosening direction. As a result, the screw 37 with the knob supporting the backrest 4 and the mounting screw 4
1 is removed, and the backrest 4 can be freely moved. Therefore, the backrest 4 is moved back and forth so that the depth becomes a desired length, and the backrest 4 is further rotated so that the angle of the backrest 4 becomes a desired angle. That is, the depth is set by selecting one of the third mounting holes 13 that match the first mounting hole 33 from the plurality of third mounting holes 13 that are continuous in the front-rear direction. The second mounting hole group 34
Are drilled on an arc centered on the first mounting hole 33, so that when the third mounting hole 13 that matches the first mounting hole 33 is selected, the third mounting hole 13 that matches the second mounting hole group 34 is selected. The four mounting holes 14 are uniquely determined. Thereafter, the fourth mounting hole 14
The angle of the backrest 4 is set by selecting one of the second mounting holes 34a from the second mounting hole group 34 that matches the angle.

Thereafter, the mounting screw 41 is screwed into the first mounting hole 33 again through the third mounting hole 13, and the screw 37 with the knob is screwed into the fourth mounting hole 14 through the second mounting hole 34a. Thereby, the backrest 4 is supported in a state where both the depth and the angle are adjusted.

On the other hand, when adjusting only the angle of the backrest 4 without adjusting the depth, the screw 37 with the knob screwed into the third mounting hole 13 is rotated in a loosening direction.
The neck portion 39 of the screw 37 with the knob is in a state where it does not engage with the counterbore portion 35 of the second mounting hole group 34. In this state, the mounting plate 32 of the backrest 4 can be moved with respect to the screw 37 with the knob, that is, the backrest 4 can be rotated about the first mounting hole 33. One of the second mounting holes 34a that matches the fourth mounting hole 14 is selected from the second mounting hole group 34 so that the angle of the second mounting hole 14 becomes the desired angle. Thereafter, when the screw 37 with the knob is tightened, the neck 39 of the screw 37 with the knob is housed in the counterbore 35, and the rotation of the backrest 4 is prevented by the engagement relationship between the neck 39 and the peripheral wall of the counterbore 35. Is done.

When adjusting the height of the seating surface 17, first, eight mounting screws 28 screwed into the screw holes 23 of the support base 19 are rotated in a direction to loosen. Thus, the mounting screw 28 supporting the seat 3 is removed, and the seat 3 can be freely moved. Therefore, the seat 3 is moved up and down so that the height of the seat surface 17 becomes a desired length. That is, the height of the seating surface 17 is set by selecting two fifth mounting holes 12 that match the screw holes 23 from among the plurality of fifth mounting holes 12 that are vertically continuous. Thereafter, the mounting screw 28 is inserted into the fifth mounting hole 12 and screwed into the screw hole 23. As a result, the seat 3
It is supported with the height adjusted.

Further, when adjusting the angle of the seat surface 17, first, the screw 27 with the knob screwed into the screw hole of the bridging portion 21 of the support base 19 is rotated in the loosening direction. Thereby, the support base 19 is detached from the bracket 25, and the seat body 18 can be freely rotated. Therefore, the butterfly plate 2 is set so that the angle of the seating surface 17 becomes a desired angle.
The seat body 18 is rotated about the axis 4. That is, the sixth mounting hole 26 of the bracket 25 that matches the screw hole is
The angle of the seating surface 17 is set by selecting one from a plurality of sixth mounting holes 26 that are vertically connected. After that, the screw 27 with the knob is inserted into the sixth mounting hole 26 and screwed into the screw hole. Thus, the support base 19 is fixed to the bottom surface of the seat body 18 via the bracket 25, and the seat body 18 is supported with the angle of the seat surface 17 adjusted.

As described above, in the chair 1 described above, both the depth and the angle of the backrest 4 can be adjusted only by removing the screw 27 with the knob and the mounting screw 41 and changing the mounting hole to be aligned with each other. For this reason, the depth and the angle of the backrest 4 can be easily changed according to the user's body shape, physical condition, usage method, or the like, and the user can always use the device in a comfortable state. Further, it has an extremely simple structure, and can be manufactured at low cost.

In the chair 1 described above, the center of rotation of the backrest 4 can be positioned on the backrest body 31. Therefore, a change in the depth when the angle of the backrest 4 is adjusted can be suppressed to be small. That is, it is also possible to adjust only the angle of the backrest 4 without changing the depth. Further, since the screw 37 with the knob fastened to the fourth mounting hole 14 is inserted from the backrest 4 side, the head 40 of the screw 37 with the knob does not protrude outward. Therefore, it is possible to prevent the head 40 from being caught on a wall, clothes, or the like.

In the chair 1 described above, when only the angle of the backrest 4 is adjusted, the fastening state can be loosened to some extent without removing the screw 37 with the knob.
Can be rotated. Therefore, workability in adjustment can be further improved. In addition, since the rotation of the backrest 4 is reliably prevented by tightening the screw 37 with the knob to a certain degree or more, the safety of the user can be ensured.

Further, in the above chair 1, since the height of the seat surface 17 and the angle of the seat surface 17 can be easily adjusted, these adjustments are performed in addition to the adjustment of the depth and the angle of the backrest 4. Thereby, the comfort of the user can be further improved.

Further, since the chair 1 is provided with the casters 6 and the grips 5, the user can easily push the grip 5 with the grips 5 and move the user who has difficulty walking while sitting. Is possible. In particular, since the position of the grip 5 does not change even if the position of the backrest 4 or the angle of the backrest 4 is changed, the grip 5 can always be pushed in a fixed posture. In addition, since a relatively large caster 6 is used, the caster 6 can be easily moved and the pain of the tatami and carpet can be suppressed.

As described above, the present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to these embodiments, and will be described below without departing from the gist of the present invention. Various refinements and design changes are possible.

That is, in the chair 1 of the above-described embodiment, the screw 37 with the knob is shown as the mounting screw to be screwed into the fourth mounting hole 14, but a normal bolt tightened with a tool such as a screwdriver is used. It may be. But,
As in the present embodiment, by using the knob-equipped type, it can be tightened or loosened without using a tool, so that it can be adjusted anywhere.

Further, in the chair 1 of the above embodiment, the mounting hole of one member is shown as a screw hole. However, both mounting holes of the two members are made through holes, and the mounting screw is screwed to the nut. By doing so, the two members may be fastened.

Further, in the chair 1 of the above-described embodiment, the pillar supporting the armrest member 10 is also used as a leg, but it may be constituted by a separate member from the leg. However, as in the present embodiment, by integrally forming, the number of parts is reduced, it is possible to manufacture at a lower cost, and it is made to function as a support for adjusting the height of the seating surface 17. Becomes possible.

Further, in the chair 1 of the above embodiment, the plurality of second mounting holes 34a are shown to communicate with each other, but they may be formed independently. In this case, the counterbore 35 may not be formed in the second mounting hole 34a.

[0048]

As described above, in the chair according to the first aspect of the present invention, both the depth and the angle of the backrest can be adjusted only by removing the two mounting screws and changing the mounting holes. For this reason, the depth and the angle of the backrest can be easily changed according to the user's body shape, physical condition, usage method, and the like, and the user can always use the device in a comfortable state. Further, it has a very simple structure and can be manufactured at low cost.

In the chair according to the second aspect of the invention, in addition to the effects of the first aspect, the center of rotation of the backrest can be positioned on the backrest body. For this reason, a change in depth when adjusting the angle of the backrest can be suppressed to a small value. That is, it is also possible to adjust only the angle of the backrest without changing the depth. Further, since the mounting screw fastened to the fourth mounting hole is inserted from the backrest side, the head of the mounting screw does not protrude outward. Therefore, for example, even if a screw with a knob is used as the mounting screw, the knob can be prevented from being caught on a wall, clothes, or the like.

In the chair according to the third aspect of the present invention, in addition to the effect of the second aspect, when only the angle of the backrest is adjusted,
Even if the mounting screw is not removed, the backrest can be rotated by loosening the fastening state to some extent. Therefore, the adjustment work is further facilitated. Moreover, when the mounting screw is tightened to a certain degree or more, the rotation of the backrest is reliably prevented, so that the safety of the user can be ensured.

In the chair according to the fourth and fifth aspects of the present invention, in addition to the effects of any one of the first to third aspects, the height of the seat surface and the angle of the seat surface can be easily adjusted. Can be. Therefore, by performing these adjustments in addition to the adjustment of the depth and the angle of the backrest, the comfort of the user can be further improved.

The chair according to the sixth aspect of the present invention has the effect of any one of the first to fifth aspects of the present invention. Can be moved in a sitting state. In addition, since the position of the grip does not change even if the position of the backrest or the angle of the backrest is changed, the grip can always be pushed in a fixed posture.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a chair according to one embodiment of the present invention.

FIG. 2 is a front view showing a configuration of a chair according to one embodiment of the present invention.

FIG. 3 is a plan view showing a configuration of a chair according to one embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a configuration of a chair according to one embodiment of the present invention.

FIG. 5 is a perspective view showing a configuration of a seat in a chair according to an embodiment of the present invention.

FIG. 6A is a diagram illustrating a configuration of a chair according to an embodiment of the present invention.
It is -A sectional drawing.

FIG. 7B shows a configuration of a chair according to an embodiment of the present invention.
It is -B sectional drawing.

8A is a partially enlarged cross-sectional view showing a configuration of a main part of a chair, and FIG. 8B is a partially enlarged side view showing a configuration of a main part of the chair.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair 3 Seat 4 Backrest 5 Grip 8 Front support (combination of leg) 9 Rear support (combination of leg) 10 Armrest member 12 Fifth mounting hole 13 Third mounting hole 14 Fourth mounting hole 15 Extension Part 17 Seat surface 18 Seat main body 19 Support base 23 Screw hole 24 Butterfly plate (shaft support member) 25 Bracket 26 Sixth mounting hole 27 Screw with knob (Mounting screw) 28 Mounting screw (Seat mounting screw) 30 Backrest DESCRIPTION OF SYMBOLS 31 Backrest main body 32 Mounting plate 33 First mounting hole 34a Second mounting hole 35 Counterbore 36 Through hole 37 Screw with knob (mounting screw) 38 Male screw 39 Neck 40 Head

Claims (6)

[Claims] 1. A seat, a pair of armrest members attached to the seat via a column and extending in the front-rear direction, a backrest supported between the pair of armrest members, the armrest member and the back A chair having a mounting hole formed in each of the opposing surfaces of the back, and a mounting screw inserted into the mounting hole and mounting the backrest to the armrest member by screwing, wherein the backrest includes: The mounting hole has one first mounting hole, and a plurality of second mounting holes drilled on an arc centered on the first mounting hole, the armrest member, as the mounting hole, A plurality of third mounting holes drilled continuously in the front-rear direction and matching the first mounting hole; and a plurality of fourth mounting holes drilled continuously in the front-rear direction and matching the second mounting hole. And the third mounting hole matching the first mounting hole is provided with a plurality of the third mounting holes. By selecting from among the holes, the depth of the backrest with respect to the seat portion is set, and the second mounting hole that matches the fourth mounting hole is selected from a plurality of the second mounting holes. The angle of the backrest with respect to the seat portion is set by the following. 2. The backrest has a backrest body having a backrest portion, and protrudes rearward from both left and right ends of the backrest body, and is provided with the first mounting hole and the second mounting hole. A mounting plate, wherein the first mounting hole and the fourth mounting hole are configured by screw holes into which the mounting screw can be screwed, and the mounting screw can be inserted through the second mounting hole and the third mounting hole. 2. The chair according to claim 1, wherein the chair comprises a through hole of a suitable size. 3. A mounting screw inserted into the second mounting hole,
A male screw portion, a neck portion having a larger diameter than the male screw portion, and a head portion for rotating the male screw portion, wherein the second mounting hole is a counterbore in which the neck portion of the mounting screw is stored. 3. The device according to claim 2, wherein the adjacent counterbore portions communicate with each other in a range where the neck portion does not pass, and the adjacent through holes communicate with each other in a range in which the male screw portion can pass. Chair described in. 4. The post comprises a leg / post which extends to a position below the seat, and a screw hole provided on a side surface of the seat; A plurality of fifth mounting holes drilled in a row, and a seat mounting screw inserted through the fifth mounting hole and screwed into the screw hole, the fifth mounting hole matching the screw hole. The chair according to any one of claims 1 to 3, wherein the height of the seat is set by selecting five mounting holes from the plurality of fifth mounting holes. 5. The seat, comprising: a seat body having a seating surface; a support table disposed below the seat body; and a front or rear side of the seat body with respect to the support table. A support member rotatably supporting one of the support members, and a plurality of sixth mounting holes drilled continuously in the vertical direction, the other of either the front side or the rear side of the seat body being the support base; And a screw hole provided on a side surface of the support base facing the bracket, wherein the sixth mounting hole matching the screw hole includes a plurality of the sixth mounting holes. The angle of the seating surface is set by selecting from among the above, and the angle is set.
Chair according to any one of the above. 6. The armrest member has an extended portion extending rearward, and a grip for pushing a chair is erected between the pair of extended portions. The chair according to any one of claims 1 to 5.